Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2023 Trek FX Sport 4
Estimated used market value
$535 - $551
Actual value depends on condition, size, and local demand.
Value Guide market data · 2023 Trek FX Sport 4
12-month projected trend
12%
Direction and magnitude, not judgment
vs. category average
20%
Drops faster than category avg
Price over time - 2023 Trek FX Sport 4
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All FX model years
Overview
About this bike
FX Sport 4 is a carbon fiber fitness bike for riders who want the speed of a lightweight road bike with the comfort and control of a flat handlebar. The 1x drivetrain simplifies shifting without sacrificing gear range, making this high-performance bike perfect for everything from solo workouts to speedy group rides.
Specifications
- Subtype
- Fitness & Hybrid
- Category
- Hybrid
- Component Rim
- Bontrager Paradigm, Tubeless Ready, 32-hole, 21mm width, presta valve
- Component Fork
- Carbon, hidden fender mounts, flat mount disc, 5x100mm thru-skew
- Component Stem
- Bontrager Elite, 31.8mm 7 Degree 90mm Reach, Black
- Component Tire
- Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700x40c
- Component Tube
- Innertube, 700 x 35-43, Presta Valve
- Product Family
- FX
- Component Chain
- KMC X10 10 Speed Chain
- Component Color
- Greydark; White; Greendark
- Component Cover
- Frame Part Trek, Duotrap S Frame Cover
- Component Crank
- Prowheel crankset TK01-42P-TT. Alloy, 42T narrow-wide ring, 170mm length. Substitute is: Shimano GRX crankset FC-RX600 in combination with a Shimano Press Fit bottom bracket: BB-RS500-PB
- Component Decal
- Stick-On Trek Shield Headtube Badge, Black
- Component Grips
- Bontrager Satellite Plus IsoZone, Double Lock-On, Black/Clear; Bontrager IsoZone Pad Insert, White, Left; Bontrager IsoZone Pad Insert, White, Right
- Component Pedal
- Pedal Bontrager City. Black
- Component Nipple
- Alpina 14G Brass Nipple
- Component Saddle
- Saddle, Bontrager Nebula H1, Black
- Component Spacer
- Headset Spacer, 10mm 1-1/8in, Black; Headset Spacer, 20mm 1-1/8in, Black
- Component Spokes
- Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 288mm Front Non-Drive Side; Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 288mm Rear Drive Side; Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 289mm Front Drive Side; Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 289mm Rear Non-Drive Side
- Component Bearing
- Headset bearing 1.5'' (51mmX40mmX6.5mm) 36 degree
- Component Shifter
- Shimano Deore Shifter. Item Number: SL-M4100-R, 10-Speed, Rapidfire Plus, Inner Cable Length: 2400mm, With Optical Gear Display. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Component Cassette
- Shimano Deore Cassette. Item Number: CS-M4100, 10-Speed, 11-13-15-18-21-24-28-32-37-46T. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Component Fastener
- Button Head Screw, M5 x 0.8mm x 16, Stainless,; M5 X 16mm Water Bottle Bolt, Stainless Steel, Black; Water Bottle Boss Plug, Plastic, Black. (For covering unused water bottle holes); M4x0.7x14mm Stainless; Speed Concept Basebar/Stem faceplate bolt
- Component Hub Axle
- Rear Hub Rebuild Kit for Approved Loose-Ball FM-32 135mm OLD Hubs
- Component Hub Body
- Freehub, Body, Bontrager SSR, FH-04
- Component Hub Part
- 6-Bolt Adapter for Centerloc Hubs
- Component Rear Hub
- Hub Rear Formula CL-52 Centerlock Disc 32h Black
- Component Seatpost
- Bontrager SSR 2-Bolt, 27.2x330mm, 12mm Offset, Black
- Component Brake Pad
- Brake Pad, Shimano B-Series Shape : CONFIRM COMPATIBILITY BEFORE USE. BRAKE SPEC IS SUBJECT TO SUBSTITUTION AND MAY VARY.
- Component Brake Set
- Promax DSK-927 rear hydraulic disc, flat mount; Promax DSK-927 front hydraulic disc, flat mount
- Component Fork Part
- Front Thru-Skew fixed retention nut for non-QR skewers
- Component Front Hub
- Front Hub 32 Hole Alloy QR, Black
- Component Handlebar
- Bontrager Satellite Plus IsoZone, 31.8mm, 15mm rise, 600mm width, Black
- Component Rim Strip
- Bontrager Wide High-Pressure Rimstrip 21mm 700C
- Component Brake Part
- Hub Part Bontrager Centerlock Lockring
- Component Frame Part
- Trek Frame Part, Internal Housing Grommet
- Component Rear Wheel
- Rear Wheel With Formula CL-52 Hub. OLD: 135mm. Axle: 145mm. With Bontrager Paradigm TLR 700c Rim. 32 holes. Clincher/TLR Presta. Pinned. Non Eyeleted. 21mm Innerhook Bead. Anodized Black
- Component Chain Guard
- 3S chainkeeper for 1X systems. 38t-46t range.
- Component Front Wheel
- Front Wheel with Formula CL-51 Hub. OLD: 100mm. 32 holes. QR. With Bontrager Paradigm TLR 700c Rim. Presta. Pinned. Non-Eyeleted. 21mm Hook Bead. Anodized Black
- Component Rear Skewer
- Bolt-On Thru-Skew Bolt Type, 135mm. Effective Length: 169mm. Black
- Component Seat Collar
- Bontrager Bolt-On Seat Clamp, 31.9mm, Black
- Component Front Skewer
- Bolt-On Thru-Skew Bolt Type, 100mm. Effective Length: 134.5mm. Black
- Component Headset Part
- Bontrager Headset Topcap, w/ Steerer Tube Expander for Trek Carbon Steerer Tubes, Black; Headset internal cable routing upper bearing cover; Headset split ring for internal cable routing
- Component Touch Up Paint
- Paint Color: Gloss Lithium Grey, TK013-M
- Component Frame With Fork
- FX Sport Frame, 400 OCLV Carbon, internal routing, 3s chain keeper, DuoTrap S compatible, fender mounts, flat mount disc, 135x5mm Thru Skew
- Component Rear Derailleur
- Shimano Deore Derailleur Rear. Item Number: RD-M5120, 11-Speed, Direct Attachment, SGS Cage, Max 46T, Shadow Plus design. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Component Cable Housing Set
- Bontrager Shift Housing 4mm Black
- Component Derailleur Hanger
- Trek derailleur hanger for Thru-Sku system on FX Carbon and Marlin 29 2023
- Chain
- KMC X10 10 Speed Chain
- Seatpost
- Bontrager SSR 2-Bolt, 27.2x330mm, 12mm Offset, Black
- Saddle
- Saddle, Bontrager Nebula H1, Black
- Handlebar
- Bontrager Satellite Plus IsoZone, 31.8mm, 15mm rise, 600mm width, Black
- Rear Derailleur
- Shimano Deore Derailleur Rear. Item Number: RD-M5120, 11-Speed, Direct Attachment, SGS Cage, Max 46T, Shadow Plus design. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Stem
- Bontrager Elite, 31.8mm 7 Degree 90mm Reach, Black
- Cassette
- Shimano Deore Cassette. Item Number: CS-M4100, 10-Speed, 11-13-15-18-21-24-28-32-37-46T. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Fork
- Carbon, hidden fender mounts, flat mount disc, 5x100mm thru-skew
- Front Hub
- Front Hub 32 Hole Alloy QR, Black
- Rear Hub
- Hub Rear Formula CL-52 Centerlock Disc 32h Black
- Shifter
- Shimano Deore Shifter. Item Number: SL-M4100-R, 10-Speed, Rapidfire Plus, Inner Cable Length: 2400mm, With Optical Gear Display. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Color
- Greydark; White; Greendark
- Spokes
- Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 288mm Front Non-Drive Side; Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 288mm Rear Drive Side; Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 289mm Front Drive Side; Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 289mm Rear Non-Drive Side
- Rear Wheel
- Rear Wheel With Formula CL-52 Hub. OLD: 135mm. Axle: 145mm. With Bontrager Paradigm TLR 700c Rim. 32 holes. Clincher/TLR Presta. Pinned. Non Eyeleted. 21mm Innerhook Bead. Anodized Black
- Front Wheel
- Front Wheel with Formula CL-51 Hub. OLD: 100mm. 32 holes. QR. With Bontrager Paradigm TLR 700c Rim. Presta. Pinned. Non-Eyeleted. 21mm Hook Bead. Anodized Black
- Cable Housing Set
- Bontrager Shift Housing 4mm Black
- Chain Guard
- 3S chainkeeper for 1X systems. 38t-46t range.
- Crank
- Prowheel crankset TK01-42P-TT. Alloy, 42T narrow-wide ring, 170mm length. Substitute is: Shimano GRX crankset FC-RX600 in combination with a Shimano Press Fit bottom bracket: BB-RS500-PB
- Decal
- Stick-On Trek Shield Headtube Badge, Black
- Grips
- Bontrager Satellite Plus IsoZone, Double Lock-On, Black/Clear; Bontrager IsoZone Pad Insert, White, Left; Bontrager IsoZone Pad Insert, White, Right
- Nipple
- Alpina 14G Brass Nipple
- Pedal
- Pedal Bontrager City. Black
- Rim
- Bontrager Paradigm, Tubeless Ready, 32-hole, 21mm width, presta valve
- Rim Strip
- Bontrager Wide High-Pressure Rimstrip 21mm 700C
- Seat Collar
- Bontrager Bolt-On Seat Clamp, 31.9mm, Black
- Tire
- Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700x40c
- Touch-Up Paint
- Paint Color: Gloss Lithium Grey, TK013-M
- Tube
- Innertube, 700 x 35-43, Presta Valve
- Bearing
- Headset bearing 1.5'' (51mmX40mmX6.5mm) 36 degree
- Cover
- Frame Part Trek, Duotrap S Frame Cover
- Derailleur Hanger
- Trek derailleur hanger for Thru-Sku system on FX Carbon and Marlin 29 2023
- Fastener
- Button Head Screw, M5 x 0.8mm x 16, Stainless,; M5 X 16mm Water Bottle Bolt, Stainless Steel, Black; Water Bottle Boss Plug, Plastic, Black. (For covering unused water bottle holes); M4x0.7x14mm Stainless; Speed Concept Basebar/Stem faceplate bolt
- Frame Part
- Trek Frame Part, Internal Housing Grommet
- Headset Part
- Bontrager Headset Topcap, w/ Steerer Tube Expander for Trek Carbon Steerer Tubes, Black; Headset internal cable routing upper bearing cover; Headset split ring for internal cable routing
- Front Skewer
- Bolt-On Thru-Skew Bolt Type, 100mm. Effective Length: 134.5mm. Black
- Rear Skewer
- Bolt-On Thru-Skew Bolt Type, 135mm. Effective Length: 169mm. Black
- Spacer
- Headset Spacer, 10mm 1-1/8in, Black; Headset Spacer, 20mm 1-1/8in, Black
- Brake Pad
- Brake Pad, Shimano B-Series Shape : CONFIRM COMPATIBILITY BEFORE USE. BRAKE SPEC IS SUBJECT TO SUBSTITUTION AND MAY VARY.
- Hub Part
- 6-Bolt Adapter for Centerloc Hubs
- Frame with Fork
- FX Sport Frame, 400 OCLV Carbon, internal routing, 3s chain keeper, DuoTrap S compatible, fender mounts, flat mount disc, 135x5mm Thru Skew
- Brake Part
- Hub Part Bontrager Centerlock Lockring
- Fork Part
- Front Thru-Skew fixed retention nut for non-QR skewers
- Hub Body
- Freehub, Body, Bontrager SSR, FH-04
- Brake Set
- Promax DSK-927 rear hydraulic disc, flat mount; Promax DSK-927 front hydraulic disc, flat mount
- Hub Axle
- Rear Hub Rebuild Kit for Approved Loose-Ball FM-32 135mm OLD Hubs
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.